©iStockphoto/Brian Raisbeck |
When water held in the ballast tanks of ships is pumped out, disease-causing microbes could be released into new environments, researchers warn. |
"There is no romantic adventure or skullduggery at work here," said Professor Fred Dobbs from Old Dominion University, Virginia. Ships pump water in and out of ballast tanks to adjust the waterline and compensate for cargo loading, making the ship run as efficiently as possible. These tanks can hold thousands of tonnes of water. "Any organisms in the water are likely to be released when it is next pumped out."